Tape a 12-inch square sheet of heavyweight vellum onto a wall using art tape, which can be applied and removed without leaving behind any residue. Position the vellum approximately 40 inches off of the ground.
Place a chair in front of the vellum and ask a friend or family member to sit on the chair and turn sideways.
Place a lamp in front of the chair, which will cast a silhouette shadow of your friend or family member's face onto the vellum.
Trace the outline of the silhouette onto the vellum using a wax pencil.
Remove the vellum and tape from the wall, then place the vellum sheet onto a matte cutting board.
Cut around the drawn lines using a pen knife, then remove the whole interior to create a silhouette stencil.
Tape the vellum stencil onto a throw pillow using art tape.
Coat the tip of a sponge brush with fabric paint, then tap the sponge brush over the vellum stencil. Fill in the stencil evenly with a light coating of fabric paint.
Remove the stencil and art tape, then allow the stenciled silhouette to air dry for 1 hour.